#注释  python没有大括号，依靠缩进
#import导包
#python是弱类型语言
import random

from pygame import *


num = random.randint(1, 10)
print(num)

num2 = random.random()
print(num2)

print("hello world 1")
print('hello world 2')
print('''hello world 3''')
for i in range(1,10,3):#左闭右开区间
    print(i)
print("hello world 4")